It may be a long time before the seats are actually "done", but I now need a place to sit other than a blanket. I've started to drive the car a bit and hope to actually take it down the road soon. Here's a pic of the fabricated seat tracks.  It' s pretty common to use the old fiero tracks and fabricate adjustable seat brackets.  For the drivers side, use the driver's side outer rail with the passenger side outer rail.  For the passenger side, use the driver's inner side rail with the passenger inner side rail.  Add two flat bar pieces to hold them together.  For the front mounting surface, use a piece of 1 3/4" x 3" angle iron mounted 120 degrees in relation to the track. New springs are added in the original locations to make sure the seat latches properly.